#pragma once

#include "core/effect.hpp"

namespace effector {

// Softens its input with a separable box blur, repeated a few times to
// approximate a gaussian. It needs no source images of its own: given none it
// blurs an empty canvas, which is what makes it usable as a pure filter stage.
class BlurEffect : public Effect {
public:
    std::string name() const override { return "blur"; }
    std::string title() const override { return "Blur"; }
    std::string description() const override {
        return "Softens its input with a repeated box blur, horizontally, vertically or both; "
               "with sources loaded it fills the canvas from a randomly chosen one first.";
    }
    const std::vector<ParamSpec>& params() const override;
    bool needsSources() const override { return false; }

    Image render(const std::vector<Image>& sources, int width, int height, Rng& rng,
                 const ParamValues& values) const override;
};

}  // namespace effector